JP3144305B2 - Electric cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric cooker to which a motor is applied.

[0002]

2. Description of the Related Art FIG. 5 shows the structure of an electric cooker to which a conventional motor is applied. As a method for lowering the bearing temperature of a motor, a configuration is adopted in which a cooling fan is held by another motor to blow air. Was.

[0003]

In this electric cooker, the number of motors is increased by one and the cost is increased. In addition, the size of the product increases in order to secure a space for installing the increased motor.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an electric cooker in which the bearing temperature of a motor can be reduced at a low cost and in a small space.

[0005]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention relates to an inner housing having a heating element, a double-shaft type motor disposed outside the inner housing, and an inner housing. An outer housing that covers the body and the motor, and a bottom plate that covers the bottom of the outer housing; one of the motor shafts is housed in an inner housing or a conduit that forms an air passage with the inner housing. A cooling fan that blows air to the bearing side of the motor is held at the other end of the motor shaft, and an intake port is provided on the bottom plate below the cooling fan. And a cooling cover that covers the outside of the motor. The cooling fan causes air to flow from the outside of the bottom plate to the motor bearing, and the motor of the cooling cover
-Horizontally or axially below the bearings on both sides of the side wall
The air-concentrating fins that are inclined upward and protruded are provided .

As a result, the high-temperature air around the inner casing caused by the heat generated by the heat-generating element is blocked by the cooling cover and is not taken in, and the air having a lower temperature is taken in from the intake port of the bottom plate to lower the temperature of the bearing. . This makes it possible to reduce the temperature of the motor bearing at low cost and in a small space without using another motor.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to an inner housing having a heating element, a double-shaft type motor disposed outside the inner housing, and the inner housing. And an outer housing that covers the motor, and a bottom plate that covers the bottom of the outer housing. One of the motor shafts is housed in an inner housing or a conduit that forms an air passage with the inner housing. A fan is held, a cooling fan that blows air to the bearing side of the motor is held on the other side of the motor shaft, and an intake port is provided on the bottom plate below the cooling fan, and the intake port, the cooling fan, the cooling cover for covering the outside of the motor is provided, along with to to put the flow of air from the bottom plate outward to the motor bearing by the cooling fan, the motor side wall of said cooling cover
Tilting both horizontally and axially below the bearings on both sides of the surface
The air-concentrating fins are inclined and protruded.High- temperature air around the inner casing caused by the heat generated by the heating element is cut off by the cooling cover and not taken in. This has the effect of lowering the temperature of the bearing by inhaling low air. In particular, intake air from the bottom plate
Concentrated low-temperature air flows through the bearings,
It has the effect that the temperature can be reduced.

According to a second aspect of the present invention, a guide plate is provided around the through hole of the motor shaft of the cooling cover so as to protrude to the vicinity of the motor and cover the periphery of the motor bearing. In addition, an air collecting plate that protrudes from the motor bearing side and forms an air passage with the cooling cover is provided.Hot air around the bearing is drawn into the shaft center of the fan by rotation of the fan, and suction from the bottom plate It has the effect that the temperature of the bearing can be reduced by smoothly replacing the low-temperature air sucked from the mouth and promoting the reduction in the temperature of the bearing atmosphere.

According to a third aspect of the present invention, an outside air intake communicating with the outer casing is provided in a part of the conduit including the fan, and the rotation of the fan guides the air toward the axial center of the fan. The low-temperature air outside the road is taken in, the temperature of the high-temperature air in the conduit is reduced, and the heat conduction from the motor shaft to the bearing is suppressed, whereby the temperature of the bearing can be reduced.

[0010]

1 and 2 are partial sectional views of an electric cooker to which a motor according to the present invention is applied. 1 and 2, an inner housing 2 having a heating element 1 and a conduit 3 forming an air passage with the inner housing 2 outside the inner housing 2 are connected.
A double shaft type motor 6 is attached to the conduit 3. An air collecting plate 5 protruding from the bearing B11 side of the motor and forming an air conducting path with the cooling cover 15 is cut and raised around the through hole of the motor shaft 7 of the conduit 3.
An outside air intake 4 communicating with the outer housing 12 is provided on an extension of the shaft 7.

An intake fan 9 is held on one of the shafts 7 of the motor 6, and the motor 6 is mounted on the other of the motor shaft 7.
A cooling fan 8 for blowing air is held on the side of the bearing A10, an outer housing 12 covers the inner housing 2, the conduit 3, and the motor 6, and a bottom plate 13 covers the bottom of the outer housing 12. An intake port 14 is provided on the bottom plate 13 below the cooling fan 8,
The intake port 14 is arranged so as not to be disposed on the bearing 10 side of the motor 6 from the bottom plate projection surface of the cooling fan 8. Also,
A cooling cover 15 that covers the outside of the intake port 14, the cooling fan 8, and the motor 6 is attached to the conduit 3.

An air-concentrating fin 16 protruding in the horizontal direction is cut and raised below the bearings on the side walls of the motor 6 on both side surfaces of the cooling cover 15, and further around the through hole of the motor shaft 7 to the vicinity of the motor. Protruding motor bearing B11
A guide plate 17 that covers the upper half of the area around is cut and raised.

In the above configuration, the internal temperature of the inner casing 2 rises due to the heat generated by the heating element 1, thereby increasing the temperature of the inner casing 2.
The surrounding temperature of the motor 6 and the temperature of the air in the conduit 3 are extremely high.

Here, when the motor 6 is driven, the cooling fan 8 rotates. However, since the cooling fan 8 is covered by the cooling cover 15, high-temperature air around the inner housing 2 due to a rise in the temperature of the inner housing 2 is removed. Without suction, intake port 14 of bottom plate 13
External air having a lower temperature is taken in, and the bearings A10 and B
11 can be lowered.

Further, since the intake port 14 of the bottom plate 13 is not arranged on the bearing A10 side of the motor 6 with respect to the projection surface of the bottom plate of the cooling fan 8, the low-temperature air sucked from the outside into the bottom plate 13 leaks to the outside. It is possible to prevent the amount of air for cooling from decreasing, and it is possible to efficiently lower the temperature of the bearing. If the outside air having a low temperature can be taken in and the amount of air for cooling the bearing does not decrease, the intake port 14 may be provided not only on the bottom plate 13 but also on the side surface (outer plate 12) of the cooling fan 8.

Then, as shown in FIG.
Accordingly, the low-temperature air sucked from the inlet port 14 of the bottom plate 13 flows intensively to the bearing B11, and the temperature of the bearing can be efficiently reduced.

Further, as shown in FIGS. 1 to 3, a guide plate 17 is cut and raised around the through hole of the motor shaft 7 of the cooling cover 15, and further, the air collecting plate 5 is formed around the through hole of the motor shaft 7 of the conduit 3. Hot air around the bearing B11 is drawn into the shaft center of the intake fan 9 by the rotation of the intake fan 9, and smoothly exchanged with the low-temperature air drawn from the intake port 14 of the bottom plate 13, and the ambient temperature of the bearing B11 is increased. , The temperature of the bearing B11 can be reduced.

As shown in FIG. 4, when the outside air intake 4 is provided in the conduit 3, the rotation of the intake fan 9 causes the intake fan 9 to rotate.
The low-temperature air outside of the conduit 3 is taken in toward the center of the shaft, thereby lowering the temperature of the high-temperature air in the conduit 3 and suppressing the heat conduction from the motor shaft 7 to the bearings A10 and B11. The temperature of the bearing can be reduced. The same effect can be obtained even if the outside air intake 4 is not on the extension of the shaft 7 and the shape is not circular.

[0019]

According to the first aspect of the present invention, the high-temperature air around the inner casing caused by the heat generated by the heating element is cut off by the cooling cover and is not taken in, and air having a lower temperature than the intake port of the bottom plate is removed. Inhale to lower the temperature of the bearing. As a result, an effect is obtained that the temperature of the motor bearing can be reduced at a low cost and in a small space without using another motor. In particular, on both sides of the motor side wall of the cooling cover
Projected below the surface bearing, inclined horizontally or axially upward
Air-concentrating fins that are
The low-temperature air flowed intensively to the bearings, and efficient bearings
The effect that the temperature can be lowered can be obtained.

According to the second aspect of the present invention, a guide plate is provided around the through hole of the motor shaft of the cooling cover so as to protrude to the vicinity of the motor and cover the periphery of the motor bearing. Around the hole, an air collecting plate that protrudes on the bearing side of the motor and forms an air passage with the cooling cover is provided, so that the hot air around the bearing is drawn into the fan shaft center by the rotation of the fan, and the bottom plate is suctioned. By smoothly replacing the low-temperature air sucked from the mouth and promoting a decrease in the temperature of the bearing atmosphere, it is possible to obtain an effect that a decrease in the temperature of the bearing can be promoted.

According to the third aspect of the present invention, since the outside air intake communicating with the outer casing is provided in a part of the conduit containing the fan, the rotation of the fan guides the air toward the axial center of the fan. The effect is obtained that the low-temperature air outside the road is taken in, the temperature of the high-temperature air in the conduit is reduced, and the heat conduction from the motor shaft to the bearing is suppressed, whereby the temperature reduction of the bearing can be promoted. .

[Brief description of the drawings]

FIG. 1 is a sectional view of an electric cooker according to the present invention.

FIG. 2 is a partial sectional view of the electric cooker.

FIG. 3 is an enlarged view of a main portion near a guide plate of the electric cooker.

FIG. 4 is an enlarged view of a main portion near an outside air intake of the electric cooker.

FIG. 5 is a partial sectional view of a conventional electric cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating element 2 Inner housing 3 Guide 4 External air intake 5 Air collecting plate 6 Motor 7 Shaft 8 Cooling fan 9 Intake fan 10 Bearing A 11 Bearing B 12 Outer housing 13 Bottom plate 14 Inlet 15 Cooling cover 16 Air concentration fin 17 Information board

Continued on the front page (72) Inventor Katsuya Tanioka 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. References: Shokai 57-25914 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 37/06 371 A47J 37/06 321 F24C 1/00 360 F24C 7/08 345 F24C 7/04

Claims (3)

(57) [Claims] 1. An inner housing having a heating element, a double-axis type motor disposed outside the inner housing, an outer housing covering the inner housing and the motor, and a bottom portion of the outer housing And a bottom plate that covers a bottom surface of the motor shaft. A fan accommodated in one of the motor shafts is accommodated in an inner housing or a conduit forming an air passage with the inner housing, and a motor bearing is mounted on the other of the motor shafts. A cooling fan that blows air to the side, an intake port is provided on the bottom plate below the cooling fan, and a cooling cover that covers the outside of the intake port, the cooling fan, and the motor is provided. together to Oko air flow from the bottom plate outside the motor bearings, motor of the cooling cover
-Horizontally or axially below the bearings on both sides of the side wall
An electric cooker equipped with air-concentrating fins that slope upward and protrude . 2. An inner casing having a heating element, and an inner casing having a heating element.
A double-axis type motor arranged outside and the inner casing
And an outer housing that covers the motor and a bottom plate that covers the bottom of the outer housing.
And one of the motor shafts has an inner housing or an inner housing.
A fan housed in a conduit that forms an air channel with the housing
Is held on the other side of the motor shaft on the bearing side of the motor.
A cooling fan for blowing air is held, and the bottom plate is
An intake port is provided below the cooling fan, and this intake port and
Install a cooling cover that covers the outside of the cooling fan and motor.
The cooling fan to the motor bearing from outside the bottom plate
In addition to causing air flow, the cooling cover motor
-Around the through hole of the shaft,
A guide plate that covers the periphery of the bearing is provided
-Cooling by protruding around the through hole of the shaft on the bearing side of the motor
An electric cooker provided with a cover and an air collecting plate forming an air passage . 3. An inner housing having a heating element, and an inner housing having a heating element.
A double-axis type motor arranged outside and the inner casing
And an outer housing that covers the motor and a bottom plate that covers the bottom of the outer housing.
And one of the motor shafts has an inner housing or an inner housing.
A fan housed in a conduit that forms an air channel with the housing
Is held on the other side of the motor shaft on the bearing side of the motor.
A cooling fan for blowing air is held, and the bottom plate is
Air inlet is disposed below the serial cooling fan, and the air inlet
Install a cooling cover that covers the outside of the cooling fan and motor.
The cooling fan to the motor bearing from outside the bottom plate
In addition to causing airflow, the duct with built-in fan
An electric cooker provided with an outside air intake that is partly connected to the outer casing .